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25 Cards in this Set

  • Front
  • Back
circle
The set of all points that are the same distance from a fixed point, G.
center (of circle)
the one point every other point is the same distance away from
radius
the distance from the center to the edge of the circle
diameter
the line from one edge of the circle to another and it must go thru the center point.
circumference
the distance around the edge of the circle
area
the region inside the circle itself. area = pi x radius^2
pi
the circumference/diameter. an irrational number, you can approximate it by using 3.14 or 22/7
central angle
an angle with its vertex on the center of the circle
arc
is a part of a circle
arc measure
part of 360 degrees
arc length
when we want to know how far it is from one point to another as we travel along the arc
minor arc
the smallest arc between two points on the edge of a circle
major arc
the largest arc between two points on the edge of a circle
concentric circles
circles with the same center point.
sector
Are formed by the two radii of a central angle and the arc between their endpoints on the circle
inscribed angle
an angle with its vertex on the edge of the circle with its endpoints intersecting the circle
intercepted arc
the arc formed by an inscribed angle
inscribed angle theorem
The measure of any inscribed angle is half the measure its intercepted arc
semicricle
the endpoints of any diameter divide a circle into two congruent arcs.
secant
a line that intersects a circle at two points
tangent
a line that intersects a circle at only one point
tangent/radius theorem
Any tangent of a circle is perpendicular to a radius of the circle at their point of intersection and any pair of tangents drawn at the endpoints of a diameter are parallel
chord
a segment with its endpoints on the circle
diameter/chord theorem
1) if a diameter bisects a chor, then it is perpendicular to the chord.
2) If a diameter is perpendicular to a chord, then it bisects the chord.
volume
base area x height